North Korea: "Powerful Striking Means" on Standby

You going to bark all day little doggie, or are you going to bite?

North Korea delivered a fresh round of rhetoric Thursday with claims it had "powerful striking means" on standby for a launch, while Seoul and Washington speculated that the country is preparing to test a medium-range missile during upcoming national celebrations.

CBS News correspondent Margaret Brennan, reporting from Seoul, South Korea, said on "CBS This Morning" Thursday that conflicting reports say missile launchers have been moved into a firing position.